#663D43
Closest named color: Purple Brown (#673A3F). oklch(41.1% 0.058 10.4), rgb(102, 61, 67).
Aa
White text reads best on this color (9.07:1).
About this color
#663D43 is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.058 and its hue 10°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.009 away. White text reads best on it, at 9.07:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.058) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.31:1 |
| White text | 9.07:1 |
Values
| HEX | #663D43 |
| RGB | rgb(102, 61, 67) |
| HSL | hsl(351, 25%, 32%) |
| OKLCH | oklch(41.1% 0.058 10.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #663D43 | 9.07:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #663D43 | 2.31:1 | Fails | Lc 13.2 | Not readable |
| #663D43 text on white | 9.07:1 | AAA | Lc 90.7 | Preferred for body text |
| #663D43 text on black | 2.31:1 | Fails | Lc -11.6 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#F0E7E8
oklch(93.5% 0.01 9.5)
-
Step 200
200
#E5D4D6
oklch(88.4% 0.019 9.4)
-
Step 300
300
#D5B8BB
oklch(80.8% 0.034 10.8)
-
Step 400
400
#C09398
oklch(70.7% 0.055 11.1)
-
Step 500
500
#AF787F
oklch(63.1% 0.07 10.9)
-
Step 600
600
#9A6069
oklch(55.5% 0.076 9.8)
-
Step 700
700
#835057
oklch(49.1% 0.069 11)
-
Step 800
800 (this color)
#663D43
oklch(41.1% 0.058 10.4)
-
Step 900
900
#57373C
oklch(37.6% 0.046 9.3)
-
Step 950
950
#332123
oklch(27.1% 0.028 11.8)
#663D43 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #444443 | 0.063 |
| Deuteranopia (no green cones) | #4E4B42 | 0.058 |
| Tritanopia (no blue cones) | #6D393F | 0.016 |
| Achromatopsia (no color) | #484848 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663D43
#663D43
oklch(41.1% 0.058 10.4)
- #1C5552
#1C5552
oklch(41.2% 0.059 190.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #663D43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.009
- Brownish Purple #76424E ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.076
- Chestnut #742802 ΔE 0.076
- Mud Brown #60460F ΔE 0.080
- Red Brown #8B2E16 ΔE 0.086
- Dark Mauve #874C62 ΔE 0.088
- Rust Brown #8B3103 ΔE 0.092
Use #663D43 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.